Hey Guys,

I know there are some general rules about engine sizes as far as the size of plane. But lets take for example you added a lot of weight to a rebuild (40 size crashed plane) . Is there a rule of thumb as far the amount of weight added to the increase of engine. I realize this depends on the plane design, but I do not want to rebuild a plane and it turns out to be a brick?

General theory's will be appreciated.